Improvement in printing-telegraph instruments



2 Sheets--Sheei 2. M. F.WESSMANN.

Improvement in Printing-Telegraph Instruments.

N0. 130,261. 'Pa-tented Aug. 6, 1872.

UNITED STATES PATENT IMPROVEMENT IN PRINTING-TELEGRAPH INSTRUMENTS.

Specification forming part of Letters Patent No. 130,261, dated August6, 1872.

To all whom it may concern:

Be it known that I, MARTIN RWEssMANN, of Brooklyn, in the county ofKings and State of New York, have invented an Improved Printing-Telegraph Instrument; and I do hereby declare that the following is afull and exact description thereof, reference being had to theaccompanying drawing making part of this specific'ation v Figure 1 beinga side view of a portion of a printingtelegraph instrument, showing myimprovements; Fig. 2, a side view at right angles to the view in Fig. lof the type-wheel and printing-magnets, and the side armature employedin connection with the type-wheel magnet; Fig. 3, a plan of thelocal-circuit breaking and closing mechanism employed in this invention.

Like letters designate corresponding parts in all of the figures.

The object of this invention is to produce an electro-magneticprinting-telegraph having but one line-wire, and printing both on theopen and closed circuit by means of a local battery and local circuit,all substantially as hereinafter specified.

Let A represent the type-wheel magnet of the instrument; B, itstype-wheel moving armature; O, the printing-magnet and D, the localbattery, connected with the printingmagnet by wires a and b. A sidearmature, E, is employed, vibrating laterally to and from the cores 0 cof the type-wheel magnet A on a pivot, d, the force of a counter-spring,f, alternating with the attraction of the magnet, so that this armaturevibrates simultaneously with the regular armature B of the magnet.

' Below the pivot d of this side armature projects therefrom alever-arm, G, which consequently vibrates laterally with the armature,and it is long enough to produce the required extent of vibratorymovement at its lower end, which is arranged between the adjacent endsof two vibratory levers, H and I, by the movements of which the localcircuit of the printing-magnet G is broken and closed. If desired,either for changing direction or increasing the extent of movement, thelever G may be compound, as represented in Fig. 2. The two levers H andI are respectively connected with retarding-gear f f f and g g g, thewhole arrangement being conveniently placed beneath the regularreceiving instrument, in an insulated frame, h.

The movements of the levers H I and dependent parts are substantially asfollows The vibrating lever H is employed to close the local circuit forprinting on the closed main circuit. For this purpose it is itself apart of the local circuit of the printing-magnet G and its localbattery, together with the frame h and wires i k, and binding-post Z,the entire arrangement being such that when the adjacent end of thelever strikes the bindingpost, or an adjusting-screw, m, therein, thelocal printing-circuit is closed, and wh the lever is separatedtherefrom (as shown in Fig. 3) the local circuit is opened. Thevibrations of the side armature E through the lever G throws the lever Haway from the binding-post or circuit-closing point, and a counterspring, a, draws the lever to the post and closes the circuit forprinting when the lever G is held away from the other end of the saidlever H by the attraction of the armature E to'the magnet A. Thevibrating lover I, on the other hand, is employed to effect the printingon the open main 'circuit. For this purpose one or more of its train ofretarding-gear g g 9 form part of the local printing-circuit, togetherwith a circuitclosing spring, 0, the frame h, and wires 1' p. Thecircuit-closing spring or spring-point 0 is kept between the teeth ofthe adjacent gearwheel g, so as not to come in contact with the adjacentcogs thereof, by a detent, q, as shown in Fig. 3. The lever I has apawl, 1", which takes into the teeth of a ratchet-wheel, s, attached toor turning with the cog-wheel g referred to, so that when the adjacentend of the lever is thrown back by the lever G the pawl will take holdof an advance tooth of the ratchet-wheel, ready,when the lever G ismoved away from the said lever I by the armature E, being held away fromthe magnet A, as in Fig. 2, for a counter-spring, t, acting on thelever, to move the ratchet-wheel and cog-wheel beneath it to the extentof one cog of the cogwheel, if allowed by the detent g. In order to liftthis detent from the cog-wheel at the proper moment a finger, 20,projects from the lever I, as shown in Fig. 3, and is so adjusted thatit strikes the detent and moves it away from the cog-wheel, when theother end of the lever I is thrown back far enough to take a FFICE.

new ratchet-tooth by its pawl 1, thus allowing the cog-wheel to turn onecog; and it again recedes and allows the detent to take into the nextnotch of the cog-wheel as soon as the ratchet-wheel has moved the properdistance to bring the spring-point 0 out of contact with the next cogsof the cog-wheel. Thus, although by the movement just described thespring'point 0 closes the local circuit by passing over one cog of thecog-wheel 9. so as to effect the printing, it again breaks the 10- calcircuit and keeps it open till the next movement of the type-wheelcommences. The lever I is moved by its counterspring t but slowly, onaccount of the retarding-gear g g g, and the circuit-closing motion ofthe lever H is likewise retarded by its retarding-gear f ff, which isclutched to the lever by a drum, n, and clutch-finger or frictionpawl,w, which yields and slips in the drum without turning the gear when thelever H is thrown the other way by the action of the armature-lever G.Hence, during the step-bystep movement of the type-wheel, the vibrationsof the armature E and its lever G, being simultaneous therewith andrapid, keep the adjacent ends of the levers H I separated to the extentof the vibratory motions of the said lever G, thgreby holding both thelevers H I away from circuit-closing contact with the assistance oftheir respective retardinggear; but on stopping the step-by-stepmovement of the type-wheel each time for a second or two, the lever B orI, as the case may be, has time to close the local circuit and effectthe printing.

without requiring a printing-key.

The armature E, represented herein as and called a side armature, is notnecessarily arranged at the side of the magnet-cores, but may be appliedat the end thereof; nor need it be applied to the type-wheel magnet A,but

bus the printing is automatic,

may be the ordinary armature of an additional magnet located in theline-circuit.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The side or additional armature E, with its arm or lever G vibratingsimultaneously with the type-wheel armature B, in combination with thevibratory local-circuit-closing levers H I, substantially as and for thepurpose herein specified.

2. The vibratory-lever H, arranged and operating, substantially asdescribed, in the local printing-circuit, in combination with the sidearmature-lever G, for printing automatically with closed circuits,substantially as herein specified.

3. The vibratory lever I, arranged and operating substantially asdescribed, in combination with the side armature-lever G, for printingautomatically with open circuits, substantially as herein specified.

4. The retarding-gears f f f and ggg, in combination with thecircuit-closing levers H I, as specified.

5. The combination of the lever I, pawl and ratchet-wheel r s, notchedor cog wheel G, detent q, spring-point o, and finger to, operatingsubstantially as described, for effecting the printing and then leavingthe local printingcircuit open, substantially as herein specified.

6. A printing telegraph instrument, constructed so that with oneline-wire and a local printing-circuit it prints automatically andleaves the local circuit either open or closed, substantially as hereinspecified.

Specification signed by me in presence of witnesses.

MARTIN I WVESSMANN.

Witnesses:

Bo. H. GALLAHER, En. A. GALLAHER.

